Intro Paragraph
=======
// For static rendering (non-Shiny), use a simple widget registration
// scheme. We also use this scheme for Shiny apps/documents that also
// contain static widgets.
window.HTMLWidgets.widgets = window.HTMLWidgets.widgets || [];
// Merge defaults into the definition; don't mutate the original definition.
var staticBinding = extend({}, defaults, definition);
overrideMethod(staticBinding, "find", function(superfunc) {
return function(scope) {
var results = superfunc(scope);
// Filter out Shiny outputs, we only want the static kind
return filterByClass(results, "html-widget-output", false);
};
});
window.HTMLWidgets.widgets.push(staticBinding);
if (shinyMode) {
// Shiny is running. Register the definition with an output binding.
// The definition itself will not be the output binding, instead
// we will make an output binding object that delegates to the
// definition. This is because we foolishly used the same method
// name (renderValue) for htmlwidgets definition and Shiny bindings
// but they actually have quite different semantics (the Shiny
// bindings receive data that includes lots of metadata that it
// strips off before calling htmlwidgets renderValue). We can't
// just ignore the difference because in some widgets it's helpful
// to call this.renderValue() from inside of resize(), and if
// we're not delegating, then that call will go to the Shiny
// version instead of the htmlwidgets version.
// Merge defaults with definition, without mutating either.
var bindingDef = extend({}, defaults, definition);
// This object will be our actual Shiny binding.
var shinyBinding = new Shiny.OutputBinding();
// With a few exceptions, we'll want to simply use the bindingDef's
// version of methods if they are available, otherwise fall back to
// Shiny's defaults. NOTE: If Shiny's output bindings gain additional
// methods in the future, and we want them to be overrideable by
// HTMLWidget binding definitions, then we'll need to add them to this
// list.
delegateMethod(shinyBinding, bindingDef, "getId");
delegateMethod(shinyBinding, bindingDef, "onValueChange");
delegateMethod(shinyBinding, bindingDef, "onValueError");
delegateMethod(shinyBinding, bindingDef, "renderError");
delegateMethod(shinyBinding, bindingDef, "clearError");
delegateMethod(shinyBinding, bindingDef, "showProgress");
// The find, renderValue, and resize are handled differently, because we
// want to actually decorate the behavior of the bindingDef methods.
shinyBinding.find = function(scope) {
var results = bindingDef.find(scope);
// Only return elements that are Shiny outputs, not static ones
var dynamicResults = results.filter(".html-widget-output");
// It's possible that whatever caused Shiny to think there might be
// new dynamic outputs, also caused there to be new static outputs.
// Since there might be lots of different htmlwidgets bindings, we
// schedule execution for later--no need to staticRender multiple
// times.
if (results.length !== dynamicResults.length)
scheduleStaticRender();
return dynamicResults;
};
// Wrap renderValue to handle initialization, which unfortunately isn't
// supported natively by Shiny at the time of this writing.
shinyBinding.renderValue = function(el, data) {
Shiny.renderDependencies(data.deps);
// Resolve strings marked as javascript literals to objects
if (!(data.evals instanceof Array)) data.evals = [data.evals];
for (var i = 0; data.evals && i < data.evals.length; i++) {
window.HTMLWidgets.evaluateStringMember(data.x, data.evals[i]);
}
if (!bindingDef.renderOnNullValue) {
if (data.x === null) {
el.style.visibility = "hidden";
return;
} else {
el.style.visibility = "inherit";
}
}
if (!elementData(el, "initialized")) {
initSizing(el);
elementData(el, "initialized", true);
if (bindingDef.initialize) {
var result = bindingDef.initialize(el, el.offsetWidth,
el.offsetHeight);
elementData(el, "init_result", result);
}
}
bindingDef.renderValue(el, data.x, elementData(el, "init_result"));
evalAndRun(data.jsHooks.render, elementData(el, "init_result"), [el, data.x]);
};
// Only override resize if bindingDef implements it
if (bindingDef.resize) {
shinyBinding.resize = function(el, width, height) {
// Shiny can call resize before initialize/renderValue have been
// called, which doesn't make sense for widgets.
if (elementData(el, "initialized")) {
bindingDef.resize(el, width, height, elementData(el, "init_result"));
}
};
}
Shiny.outputBindings.register(shinyBinding, bindingDef.name);
}
};
var scheduleStaticRenderTimerId = null;
function scheduleStaticRender() {
if (!scheduleStaticRenderTimerId) {
scheduleStaticRenderTimerId = setTimeout(function() {
scheduleStaticRenderTimerId = null;
window.HTMLWidgets.staticRender();
}, 1);
}
}
// Render static widgets after the document finishes loading
// Statically render all elements that are of this widget's class
window.HTMLWidgets.staticRender = function() {
var bindings = window.HTMLWidgets.widgets || [];
forEach(bindings, function(binding) {
var matches = binding.find(document.documentElement);
forEach(matches, function(el) {
var sizeObj = initSizing(el, binding);
if (hasClass(el, "html-widget-static-bound"))
return;
el.className = el.className + " html-widget-static-bound";
var initResult;
if (binding.initialize) {
initResult = binding.initialize(el,
sizeObj ? sizeObj.getWidth() : el.offsetWidth,
sizeObj ? sizeObj.getHeight() : el.offsetHeight
);
elementData(el, "init_result", initResult);
}
if (binding.resize) {
var lastSize = {
w: sizeObj ? sizeObj.getWidth() : el.offsetWidth,
h: sizeObj ? sizeObj.getHeight() : el.offsetHeight
};
var resizeHandler = function(e) {
var size = {
w: sizeObj ? sizeObj.getWidth() : el.offsetWidth,
h: sizeObj ? sizeObj.getHeight() : el.offsetHeight
};
if (size.w === 0 && size.h === 0)
return;
if (size.w === lastSize.w && size.h === lastSize.h)
return;
lastSize = size;
binding.resize(el, size.w, size.h, initResult);
};
on(window, "resize", resizeHandler);
// This is needed for cases where we're running in a Shiny
// app, but the widget itself is not a Shiny output, but
// rather a simple static widget. One example of this is
// an rmarkdown document that has runtime:shiny and widget
// that isn't in a render function. Shiny only knows to
// call resize handlers for Shiny outputs, not for static
// widgets, so we do it ourselves.
if (window.jQuery) {
window.jQuery(document).on(
"shown.htmlwidgets shown.bs.tab.htmlwidgets shown.bs.collapse.htmlwidgets",
resizeHandler
);
window.jQuery(document).on(
"hidden.htmlwidgets hidden.bs.tab.htmlwidgets hidden.bs.collapse.htmlwidgets",
resizeHandler
);
}
// This is needed for the specific case of ioslides, which
// flips slides between display:none and display:block.
// Ideally we would not have to have ioslide-specific code
// here, but rather have ioslides raise a generic event,
// but the rmarkdown package just went to CRAN so the
// window to getting that fixed may be long.
if (window.addEventListener) {
// It's OK to limit this to window.addEventListener
// browsers because ioslides itself only supports
// such browsers.
on(document, "slideenter", resizeHandler);
on(document, "slideleave", resizeHandler);
}
}
var scriptData = document.querySelector("script[data-for='" + el.id + "'][type='application/json']");
if (scriptData) {
var data = JSON.parse(scriptData.textContent || scriptData.text);
// Resolve strings marked as javascript literals to objects
if (!(data.evals instanceof Array)) data.evals = [data.evals];
for (var k = 0; data.evals && k < data.evals.length; k++) {
window.HTMLWidgets.evaluateStringMember(data.x, data.evals[k]);
}
binding.renderValue(el, data.x, initResult);
evalAndRun(data.jsHooks.render, initResult, [el, data.x]);
}
});
});
invokePostRenderHandlers();
}
function has_jQuery3() {
if (!window.jQuery) {
return false;
}
var $version = window.jQuery.fn.jquery;
var $major_version = parseInt($version.split(".")[0]);
return $major_version >= 3;
}
/*
/ Shiny 1.4 bumped jQuery from 1.x to 3.x which means jQuery's
/ on-ready handler (i.e., $(fn)) is now asyncronous (i.e., it now
/ really means $(setTimeout(fn)).
/ https://jquery.com/upgrade-guide/3.0/#breaking-change-document-ready-handlers-are-now-asynchronous
/
/ Since Shiny uses $() to schedule initShiny, shiny>=1.4 calls initShiny
/ one tick later than it did before, which means staticRender() is
/ called renderValue() earlier than (advanced) widget authors might be expecting.
/ https://github.com/rstudio/shiny/issues/2630
/
/ For a concrete example, leaflet has some methods (e.g., updateBounds)
/ which reference Shiny methods registered in initShiny (e.g., setInputValue).
/ Since leaflet is privy to this life-cycle, it knows to use setTimeout() to
/ delay execution of those methods (until Shiny methods are ready)
/ https://github.com/rstudio/leaflet/blob/18ec981/javascript/src/index.js#L266-L268
/
/ Ideally widget authors wouldn't need to use this setTimeout() hack that
/ leaflet uses to call Shiny methods on a staticRender(). In the long run,
/ the logic initShiny should be broken up so that method registration happens
/ right away, but binding happens later.
*/
function maybeStaticRenderLater() {
if (shinyMode && has_jQuery3()) {
window.jQuery(window.HTMLWidgets.staticRender);
} else {
window.HTMLWidgets.staticRender();
}
}
if (document.addEventListener) {
document.addEventListener("DOMContentLoaded", function() {
document.removeEventListener("DOMContentLoaded", arguments.callee, false);
maybeStaticRenderLater();
}, false);
} else if (document.attachEvent) {
document.attachEvent("onreadystatechange", function() {
if (document.readyState === "complete") {
document.detachEvent("onreadystatechange", arguments.callee);
maybeStaticRenderLater();
}
});
}
window.HTMLWidgets.getAttachmentUrl = function(depname, key) {
// If no key, default to the first item
if (typeof(key) === "undefined")
key = 1;
var link = document.getElementById(depname + "-" + key + "-attachment");
if (!link) {
throw new Error("Attachment " + depname + "/" + key + " not found in document");
}
return link.getAttribute("href");
};
window.HTMLWidgets.dataframeToD3 = function(df) {
var names = [];
var length;
for (var name in df) {
if (df.hasOwnProperty(name))
names.push(name);
if (typeof(df[name]) !== "object" || typeof(df[name].length) === "undefined") {
throw new Error("All fields must be arrays");
} else if (typeof(length) !== "undefined" && length !== df[name].length) {
throw new Error("All fields must be arrays of the same length");
}
length = df[name].length;
}
var results = [];
var item;
for (var row = 0; row < length; row++) {
item = {};
for (var col = 0; col < names.length; col++) {
item[names[col]] = df[names[col]][row];
}
results.push(item);
}
return results;
};
window.HTMLWidgets.transposeArray2D = function(array) {
if (array.length === 0) return array;
var newArray = array[0].map(function(col, i) {
return array.map(function(row) {
return row[i]
})
});
return newArray;
};
// Split value at splitChar, but allow splitChar to be escaped
// using escapeChar. Any other characters escaped by escapeChar
// will be included as usual (including escapeChar itself).
function splitWithEscape(value, splitChar, escapeChar) {
var results = [];
var escapeMode = false;
var currentResult = "";
for (var pos = 0; pos < value.length; pos++) {
if (!escapeMode) {
if (value[pos] === splitChar) {
results.push(currentResult);
currentResult = "";
} else if (value[pos] === escapeChar) {
escapeMode = true;
} else {
currentResult += value[pos];
}
} else {
currentResult += value[pos];
escapeMode = false;
}
}
if (currentResult !== "") {
results.push(currentResult);
}
return results;
}
// Function authored by Yihui/JJ Allaire
window.HTMLWidgets.evaluateStringMember = function(o, member) {
var parts = splitWithEscape(member, '.', '\\');
for (var i = 0, l = parts.length; i < l; i++) {
var part = parts[i];
// part may be a character or 'numeric' member name
if (o !== null && typeof o === "object" && part in o) {
if (i == (l - 1)) { // if we are at the end of the line then evalulate
if (typeof o[part] === "string")
o[part] = tryEval(o[part]);
} else { // otherwise continue to next embedded object
o = o[part];
}
}
}
};
// Retrieve the HTMLWidget instance (i.e. the return value of an
// HTMLWidget binding's initialize() or factory() function)
// associated with an element, or null if none.
window.HTMLWidgets.getInstance = function(el) {
return elementData(el, "init_result");
};
// Finds the first element in the scope that matches the selector,
// and returns the HTMLWidget instance (i.e. the return value of
// an HTMLWidget binding's initialize() or factory() function)
// associated with that element, if any. If no element matches the
// selector, or the first matching element has no HTMLWidget
// instance associated with it, then null is returned.
//
// The scope argument is optional, and defaults to window.document.
window.HTMLWidgets.find = function(scope, selector) {
if (arguments.length == 1) {
selector = scope;
scope = document;
}
var el = scope.querySelector(selector);
if (el === null) {
return null;
} else {
return window.HTMLWidgets.getInstance(el);
}
};
// Finds all elements in the scope that match the selector, and
// returns the HTMLWidget instances (i.e. the return values of
// an HTMLWidget binding's initialize() or factory() function)
// associated with the elements, in an array. If elements that
// match the selector don't have an associated HTMLWidget
// instance, the returned array will contain nulls.
//
// The scope argument is optional, and defaults to window.document.
window.HTMLWidgets.findAll = function(scope, selector) {
if (arguments.length == 1) {
selector = scope;
scope = document;
}
var nodes = scope.querySelectorAll(selector);
var results = [];
for (var i = 0; i < nodes.length; i++) {
results.push(window.HTMLWidgets.getInstance(nodes[i]));
}
return results;
};
var postRenderHandlers = [];
function invokePostRenderHandlers() {
while (postRenderHandlers.length) {
var handler = postRenderHandlers.shift();
if (handler) {
handler();
}
}
}
// Register the given callback function to be invoked after the
// next time static widgets are rendered.
window.HTMLWidgets.addPostRenderHandler = function(callback) {
postRenderHandlers.push(callback);
};
// Takes a new-style instance-bound definition, and returns an
// old-style class-bound definition. This saves us from having
// to rewrite all the logic in this file to accomodate both
// types of definitions.
function createLegacyDefinitionAdapter(defn) {
var result = {
name: defn.name,
type: defn.type,
initialize: function(el, width, height) {
return defn.factory(el, width, height);
},
renderValue: function(el, x, instance) {
return instance.renderValue(x);
},
resize: function(el, width, height, instance) {
return instance.resize(width, height);
}
};
if (defn.find)
result.find = defn.find;
if (defn.renderError)
result.renderError = defn.renderError;
if (defn.clearError)
result.clearError = defn.clearError;
return result;
}
})();
Intro Paragraph
Safety issues have always been in the spotlight, in the United States as strict gun regulations do not exist. And with the non-stop UW Alert messages reporting crimes, such as robberies and gun fires, safety has become one of the UW students’ major concerns nowadays. Therefore, as a team, we decided to tie this project to our daily lives and analyze the pattern of crimes around our community.
We will be using 3 data sets (SPD Crime Data, King County Sheriff’s Office - Incident Dataset, 911 Seattle Call Data). These datasets contain data such as offense start time, latitude & longitude, offense type, call-in resolution, etc., that help us answer these following questions:
- What areas have the highest density of crime?
- What types of crime? And in what areas?
- What is the time of year or day for the offense, length of offense, report date?
- What is the relationship between call-ins and arrests (i.e. resolution of call-ins)?
Data Description
- SPD Crime Data: This dataset provides crime data using the standardized crime classifications and is updated every twenty four hours.
- King County Sheriff’s Office - Incident Dataset: This dataset contains instances of crime reported by King Country Sherrif office and another policing agency, e.g. SPD.
- 911 Seattle Call Data: 911 call data is from the Data Analytics Platform (DAP) and is logged with the Seattle Police Department (SPD) Communications Center. It contains calls of police officers and observations of the field from within the community and is updated(upload) daily before a full refresh twice a year. Although the dataset is quite huge with 4.34 Million rows of data, we acknowledge our constraint as this dataset only includes records with police responses to the 911 call.
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Summary Paragraph
Table
Chart 1
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Chart 2
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Chart 3
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